<!-- Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/ -->
<!doctype html>

<html>
  <head>
    <meta charset="utf-8"/>
    <title>Canvas inspector test page</title>
  </head>

  <body>
    <canvas width="128" height="128"></canvas>

    <script type="text/javascript;version=1.8">
      "use strict";

      var ctx = document.querySelector("canvas").getContext("2d");

      function drawRect(fill, size) {
        ctx.fillStyle = fill;
        ctx.fillRect(size[0], size[1], size[2], size[3]);
      }

      function drawScene() {
        ctx.clearRect(0, 0, 128, 128);
        drawRect("rgba(255, 255, 255, 0)", [0, 0, 128, 128]);
        drawRect("rgba(0, 0, 192, 0.5)", [30, 30, 55, 50]);
        drawRect("rgba(192, 0, 0, 0.5)", [10, 10, 55, 50]);

        window.requestAnimationFrame(drawScene);
      }

      drawScene();
    </script>
  </body>

</html>
